body{background-color:#f2f2f2}h1{margin-top:10px;text-align:center}.login{max-width:1024px}.login .panel{max-width:350px;margin:auto}.login .panel-heading{text-align:center;font-size:1.2em}.sign .btn{text-align:left;width:100%}.sign .btn::after{content:'';display:block;clear:both}.sign .btn h2{margin-top:5px;margin-bottom:5px}.sign .btn i{color:#fff}